This article will tell you everything you need to know about a thermos. If you are interested in how to make a plug with your own hands, its structure and principle of operation, as well as other interesting details, then this article is for you!
What is a thermos
A thermos is a special type of dish designed for long-term preservation of the temperature of the liquid in it. Such dishes are suitable for preparing special foods and cereals.
What year did
Originally appeared as a Dewar vessel in 1892 year. And already in 1903, Reynold Burger improved the vessel by adding a lid to it, making a metal body and a lid. Therefore, 1903 is considered the year of invention. It was in this year that Burger received a patent for a thermos, since many changes were made to it from the first version of such dishes.
How to check a thermos when buying
Initially, it is worth conducting a visual check - the surface should be free of roughness, scratches and other defects. Also, there should be no unpleasant smell of chemistry. Quality steel is odorless. The thermos needs to be shaken and checked for noises, they should not be there.
What can be made from an old thermos
A thermos is a practical thing that can be used even after it has “served its purpose”. First, you can make an ashtray or candy bowl.
Even from the smallest vessel, you can make a bucket for flowers or the like. All items that are obtained from an old thermos can have a cylindrical shape. It can also store water.
How a thermos works
The main element is a flask, which at the end of the 19th century was called a Dewar vessel. Made of glass or stainless steel. And also, it has a metal body. Air is pumped out between the body and the bulb and a vacuum is created to reduce thermal conductivity. In addition to these elements, there is also a cork and a glass lid.
How it works and what it consists of
In thermoses, convection and heat conduction processes practically do not work. It has a mirrored surface inside so that the radiation is returned by the reflection mechanism.
A thermos consists of a flask - the part where food is stored. The flask has a neck and a stopper, and the vessel itself is closed with a lid.
On top of the flask is a body that does not adjoin the flask surface, but is at some distance and has a larger volume than the flask.
How is a cork with a wide mouth arranged?
The thermos plug with a wide lid is characterized by an oversized size. Modern corks are made of metal and resemble the shape of a flattened mushroom.
Conditionally, it can be divided into 2 parts: one is inserted inside the flask, and the second part, wider, is on top and prevents spilling and air currents.
Types of thermos
The same thermos is not suitable for carrying both coffee and soup, for example. Thermos for drinks are distinguished by a narrow neck, but a wide neck is more common in food. Food thermoses allow you to store both soups and side dishes.
There are also universal ones, with an additional narrow neck. Thermos with pots - used for food, differs in that it holds 2-3 separate containers. The thermo mug is used for drinks, it is convenient to take it on hikes or just use it at home or at work.
What can you make a cork from?
When the old cork wears out, a new one can be made from foam or wood.
Such plugs must be thoroughly disinfected before use.
How to make a cork for a thermos with your own hands
The most suitable option is to make a cork from regular foam. An element of the desired diameter and size must be cut out of a piece of foam.
Such material does not deform, but if the dish pushes such a cork with hot air, then you can pierce the middle with a needle from the syringe. To prevent the foam from crumbling, it must be wrapped with cling film.
Conclusion
A thermos is the most suitable dish for long trips or hikes. They are able to maintain the temperature of a drink or food, if a thermos is no longer used for such purposes, then something useful for the home can be made of it.